Senior Python Developer

Join a world-class team of engineers at Grid Dynamics as we build mission-critical engineering tools. We are hiring an ownership-driven Backend Developer to architect the Python-based workflow engines and state machines that bridge the gap between complex hardware requirements and streamlined digital approvals.

Essential functions:

• 🌸Design and implement high-performance, asynchronous Python backend services using FastAPI and asyncio to power complex review workflows.
• 🌸Translate intricate business logic into robust state machines, managing requirement transitions from Draft through Active to Approved/Rejected states.
• 🌸Build and maintain the integration layer with JAMA Connect’s REST API, ensuring seamless data synchronization and handling edge cases like rate limiting and retries.
• 🌸Serve as the primary architect for the client-server contract, collaborating with Swift/macOS engineers to define JSON schemas, error codes and status enums.
• 🌸Design relational database schemas in PostgreSQL that support comprehensive audit trails and versioned records for every approval decision.
• 🌸Maintain high code quality through rigorous pytest coverage and document the API lifecycle to ensure long-term maintainability for QA and future engineers.

Qualifications:

• 💦Proven experience with async I/O patterns (FastAPI, asyncio, or aiohttp) and a deep understanding of writing non-blocking, scalable code.
• 💦Strong background in designing and consuming RESTful APIs, including experience with pagination, error handling, and third-party service integrations.
• 💦Advanced skills in PostgreSQL, specifically in schema design for version tracking, complex migrations, and high-integrity audit logs.
• 💦Demonstrated experience building state machines or complex workflow engines involving multi-step approvals and status transitions.
• 💦A "test-first" mindset with professional experience using pytest for unit and integration testing against both mock and live endpoints.

We offer:

• ☘️Opportunity to work on bleeding-edge projects
• ☘️Work with a highly motivated and dedicated team
• ☘️Competitive salary
• ☘️Flexible schedule
• ☘️Benefits package - medical insurance, sports
• ☘️Professional development opportunities